Mechanic s tool



(No Model.)

E. o. STRANGE.

MEGHAVNIGS TOOL.

.1%. 563,089. PatentedJune'ao, 1896.

AN BREW BJSHAHAM. PHUTO-UTNQWAHINGTOKD C UNITED STATES PATENT OFFICE.

EMERSON O. STRANGE, OF TAUNTON, MASSACHUSETTS.

MECHANICS TOOL.

SPECIFICATION forming part of Letters Patent No. 563,089, dated June 30,1896.

Application filed April 22, 1895. Serial No. 546,718. (No model.)

To all whom t may concern,.-

Beit known that I, EMERSON C. STRANGE, a citizen of the United States,and a resident of Taunton, in the county of Bristol and State ofMassachusetts,have invented certain new and useful Improvements inMechanics Tools; and I do hereby declare that the following is a full,clear, and exact description of the invention, which will enable othersskilled in the art to which it appertains to make and use the same,reference being had to the accompanying drawings, which form a part ofthis specilication.

My invention relates to caliper-gages, principally for use by mechanicsfor various purposes; and its obj ect is to provide an improved deviceor tool which shall possess superior advantages with respect tosimplicity and economy in construction and efficiency in operation.

The invention consists in the novel construction and combination ofparts hereinafter fully described and claimed.

In the accompanying drawings, Figure 1 is a side elevation of a toolconstructed in accordance with my invention. Fig. 2 is a view of one ofthe sections disconnected from the other. Fig. 3 is a vertical sectionon the line 3 3, Fig. l. Fig. 4 is a view similar to Fig. l, showing aslightly-modified construction.

i In the said drawings, the reference-numerals l and 2 designate twosections, each consisting of a rectangular plate provided intermediateits ends with a caliper-arm 3 at right angles thereto. Near one end eachof these plates is formed with an oblong slot 4, within which works alug 5, secured to the other plate. One of these lugs, as seen in Fig. 3,is provided with a head 6 and a screw-threaded shank 7, with whichengages a thumb-nut 8, by which the sections are held in any position towhich they may be adjusted, as will hereinafter appear.

The ends of the arms 3 are formed with V- shaped recesses 9 one of whichmay be used as a lathe-center gage and the other as a thread-tool gage.

Near the inner end or the junction of the arms with the plates they areformed with beveled extensions 10, which are employed as` gages forgrinding twist and flat drills. By sliding the plates back and forth thebevels cross one another, showing the point or center of the drill. Theymay also be employed for gaging hexagon nuts. At one edge each of saidplates or sections l and 2 is formed with a graduated scale, and thearms 3 above the extension IO may also be provided with a scale.

In practice, the two sections are placed side by side with the lug ofone engaging with the slot in the other, as seen in Fig. l. By nowsliding the plates back and forth, the distance between the arms may beincreased or diminished, as the case may be, so that an object placedbetween the arms may be readily gaged, its size being determined by thescale of the plates. By tightening the thumb-nut the plates may besecurely held in any position to which they may be adjusted. In likemanner the size of a nut may be determined by placing it between thecaliper-arms. The tool may be also used as an ordinary rule and also asa square, as will be obvious. The two sections being identical in everyrespect, the tool may be produced at a very small cost.

Having thus fully described my invention, what I claim is'- As animproved article, a mechanics tool comprising the graduated and slottedrectangular plates, the lugs the heads, the shank and the thumb-nut, thecaliper-arms, at right angles to said plates and integral therewith andformed with a graduated scale, the beveled extensions at the junction ofsaid arms and plates, forming a drill-gage, and one of said arms beingformed with a V-shaped recess which serves as a lathe-center gage andthe other arm formed with a corresponding, but different-sized recesswhich serves as a thread-tool gage, substantially as described.

In testimony that I claim the foregoing as my own I have hereuntoaffixed my signature in presence of two witnesses.

EMERSON C. STRANGE.

Witnesses:

MARTIN B. HAYES, GEORGE H. BUsHEE.

